Maybe a software bug?

today I wanted to make an incremental backup, but it was so like before two days.
If there are one full image and one incremental and I want to add a incremental, the process goes fail: "1-6: Unhandled exception"
I have the latest build (800).

After "repair" with the 800 setup and a restart, I tried again to add an incremental. Now it works.

Do you experience any problems with Acronis True Image now? What have you changed in the computer (software or hardware change) before the problem appeared? Did you get the error described only if you had one full and one incremental image? When did you receive it exactly (at what stage)?